diff --git a/libs/sigc++2/SConscript b/libs/sigc++2/SConscript
index a9d5649e7b..244ff7af9e 100644
--- a/libs/sigc++2/SConscript
+++ b/libs/sigc++2/SConscript
@@ -1,3 +1,5 @@
+# -*- python -*-
+
 import glob
 import os